124 layers of anti light pollution coating, effectively reduce color polarization, restore the true color. 2Made of aluminum alloy material, wearresistant and durable, optical glass lens, dustproof and waterproof, wearresistant and scratchproof. 3Extend the exposure time, in the bright light environment, let the water, clouds appear fog, dynamic sense. 4Adjustable ND lens, reduce the amount of light, reduce shutter speed, extend exposure time, use large aperture. 5ND2ND400 can be adjusted to reduce the light lens, from 1 to 8 levels of stepless adjustment, according to the exposure requirements to adjust the gray level, choose different gear to reduce the brightness into the lens.1 x Camera Lens Filter1 x Storage Box